Android obtains the local IP address (not localhost) and MAC address.

This method passed the Motorola milestone test. This function is used to obtain the IP address and MAC address of the local machine. First, create a project and modify the androidmanifest. xml file to add user permissions, as shown below.

<Uses-Permission Android: Name = "android. permission. access_wifi_state "> </uses-Permission> <br/> <uses-Permission Android: Name =" android. permission. internet "> </uses-Permission>

 

Modify/RES/layout/Main. XML as follows.

<Textview <br/> Android: Id = "@ + ID/Hello" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/>

 

The main code is as follows (getipmac. Java ):

Package exp. getipmac; <br/> Import java.net. inetaddress; <br/> Import java.net. networkinterface; <br/> Import java.net. socketexception; <br/> Import Java. util. enumeration; <br/> Import android. app. activity; <br/> Import android. content. context; <br/> Import android.net. wiFi. wifiinfo; <br/> Import android.net. wiFi. wifimanager; <br/> Import android. OS. bundle; <br/> Import android. util. log; <br/> Import android. Widget. textview; <br/> public class getipmac extends activity {<br/> Public static string hostip; // local IP address <br/> Public static string hostmac; // local Mac </P> <p>/** called when the activity is first created. */<br/> @ override <br/> Public void oncreate (bundle savedinstancestate) {<br/> super. oncreate (savedinstancestate); <br/> setcontentview (R. layout. main); <br/> textview TV = (textview) findviewbyid (R. I D. hello); </P> <p> hostip = getlocalipaddress (); // obtain the local IP address <br/> hostmac = getlocalmacaddress (); // obtain the MAC address of the Local Machine <br/>/* display the IP address and MAC address of the Local Machine */<br/> TV. settext ("hostip:" + hostip + "/nhostmac:" + hostmac ); <br/>/* output the local IP address and MAC address in the debugging information */<br/> If (hostip! = NULL) log. D ("getipmac", hostip); <br/> else log. D ("getipmac", "null"); <br/> log. D ("getipmac", hostmac); <br/>}</P> <p> Public String getlocalipaddress () {<br/> try {<br/> for (enumeration <networkinterface> en = networkinterface <br/>. getnetworkinterfaces (); en. hasmoreelements ();) {<br/> networkinterface INTF = en. nextelement (); <br/> for (enumeration <inetaddress> enumipaddr = INTF <br/>. getinetad Dresses (); enumipaddr. hasmoreelements ();) {<br/> inetaddress = enumipaddr. nextelement (); <br/> If (! Inetaddress. isloopbackaddress () {<br/> return inetaddress. gethostaddress (). tostring (); <br/>}< br/>}catch (socketexception ex) {<br/> log. E ("wifipreference IPaddress", Ex. tostring (); <br/>}< br/> return NULL; <br/>}</P> <p> Public String getlocalmacaddress () {<br/> wifimanager WiFi = (wifimanager) getsystemservice (context. wifi_service); <br/> wifiinfo info = wifi. getconnectioninfo (); <br/> return info. getmacaddress (); <br/>}< br/>}

 

Running effect: